一位接受硫酸鎂治療重度子癇前症的病人，出現下列哪項評估結果需立即進行護理介入？
Which assessment finding in a client receiving an infusion of magnesium sulfate for severe preeclampsia requires immediate nursing intervention?
- AAbsent patellar deep tendon reflexes✓ 正解膝跳反射消失
- BRespiratory rate of 16 breaths per minute呼吸頻率為每分鐘 16 次
- CUrine output of 40 mL/hour每小時尿量 40 mL
- DSerum magnesium level of 5.5 mg/dL血清鎂濃度 5.5 mg/dL
硫酸鎂（Magnesium sulfate）在治療子癇前症時，治療窗狹窄。其中毒的早期徵兆是深部肌腱反射（DTR）減弱或消失。若反射完全消失（Absent），表示血鎂濃度已達到危險水平，可能進一步引發呼吸抑制或心跳停止。護理師必須每小時評估反射、呼吸頻率與尿量，若發現反射消失，必須立即停止輸注並通報醫師。
Absent patellar deep tendon reflexes indicate magnesium toxicity, which requires immediate cessation of the infusion and notification of the provider. Magnesium sulfate has a narrow therapeutic window, and loss of reflexes is an early sign of toxicity that can progress to respiratory depression and cardiac arrest. Other findings such as a respiratory rate of 16, urine output of 40 mL/hour, and a serum magnesium level of 5.5 mg/dL are within acceptable limits.